Where does this 16.1 GB device of “Model: General UDisk (scsi)” come from?












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I installed Lubuntu 18.04 on the hard drive of a laptop (model: Toshiba Satellite C55Dt-A).



When I boot into a live Lubuntu via a bootable flash drive (4GB) , sudo parted -l reports /dev/sdb as a 16.1 GB device of "Model: General UDisk (scsi)". I can't identify it, because I only know the laptop has a hard drive and a flash drive (4GB) attached to its USB port. df -h says /dev/sdb is just 1.1 GB. Is the device some virtual one simulated by the live Lubuntu?



$ sudo parted -l
Model: ATA TOSHIBA MQ01ABF0 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
2 538MB 500GB 500GB lvm


Warning: The driver descriptor says the physical block size is 2048 bytes, but
Linux says it is 512 bytes.
Ignore/Cancel? I
Model: General UDisk (scsi)
Disk /dev/sdb: 16.1GB
Sector size (logical/physical): 2048B/512B
Partition Table: mac
Disk Flags:

Number Start End Size File system Name Flags
1 2048B 6143B 4096B Apple
2 6222kB 8614kB 2392kB EFI


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VG-home: 452GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 452GB 452GB ext4


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VG-root: 42.9GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 42.9GB 42.9GB ext4


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VG-swap: 4295MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 4295MB 4295MB linux-swap(v1)


Model: Unknown (unknown)
Disk /dev/zram3: 444MB
Sector size (logical/physical): 4096B/4096B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 444MB 444MB linux-swap(v1)


Model: Unknown (unknown)
Disk /dev/zram1: 444MB
Sector size (logical/physical): 4096B/4096B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 444MB 444MB linux-swap(v1)


Model: Unknown (unknown)
Disk /dev/zram2: 444MB
Sector size (logical/physical): 4096B/4096B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 444MB 444MB linux-swap(v1)


Model: Unknown (unknown)
Disk /dev/zram0: 444MB
Sector size (logical/physical): 4096B/4096B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 444MB 444MB linux-swap(v1)


and



$ df -h 
Filesystem Size Used Avail Use% Mounted on
udev 1.7G 0 1.7G 0% /dev
tmpfs 340M 1.4M 338M 1% /run
/dev/sdb 1.1G 1.1G 0 100% /cdrom
/dev/loop0 968M 968M 0 100% /rofs
/cow 1.7G 122M 1.6G 8% /
tmpfs 1.7G 0 1.7G 0% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 1.7G 0 1.7G 0% /sys/fs/cgroup
tmpfs 1.7G 4.0K 1.7G 1% /tmp
tmpfs 340M 12K 340M 1% /run/user/999


When I boot into the Lubuntu installed on the hard drive, the device "Model: General UDisk (scsi)" doesn't show up in the outputs of sudo parted -l and sudo lshw.
I was wondering what that device is? Thanks.



$ sudo parted -l
[sudo] password for t:
Model: ATA TOSHIBA MQ01ABF0 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
2 538MB 500GB 500GB lvm


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VG-home: 452GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 452GB 452GB ext4


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VG-swap: 4295MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 4295MB 4295MB linux-swap(v1)


Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VG-root: 42.9GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number Start End Size File system Flags
1 0.00B 42.9GB 42.9GB ext4


and



$ sudo lshw

lubuntu
description: Notebook
product: Satellite C55Dt-A (PSCFWU)
vendor: TOSHIBA
version: PSCFWU-00X005
serial:
width: 64 bits
capabilities: smbios-2.7 dmi-2.7 smp vsyscall32
configuration: boot=normal chassis=notebook family=Durban Curiosity 10AN sku=PSCFWU uuid=CD932420-D25D-11E2-B47A-008CFA609299
*-core
description: Motherboard
product: Portable PC
vendor: TOSHIBA
physical id: 0
version: MP
serial: 1
slot: Base Board Chassis Location
*-firmware
description: BIOS
vendor: Insyde Corp.
physical id: 0
version: 1.80
date: 01/27/2014
size: 128KiB
capacity: 4032KiB
capabilities: pci pnp upgrade shadowing cdboot bootselect edd int9keyboard int10video acpi usb agp smartbattery biosbootspecification netboot uefi
*-cpu
description: CPU
product: AMD A4-5000 APU with Radeon(TM) HD Graphics
vendor: Advanced Micro Devices [AMD]
physical id: 4
bus info: cpu@0
version: AMD A4-5000 APU with Radeon(TM) HD Graphics
serial: NotSupport
slot: Socket FT1
size: 874MHz
capacity: 1500MHz
width: 64 bits
clock: 100MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt topoext perfctr_nb bpext perfctr_llc hw_pstate proc_feedback vmmcall bmi1 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists pausefilter pfthreshold overflow_recov cpufreq
configuration: cores=4 enabledcores=4 threads=4
*-cache:0
description: L1 cache
physical id: 8
slot: L1 Cache
size: 256KiB
capacity: 256KiB
clock: 1GHz (1.0ns)
capabilities: pipeline-burst internal write-back unified
configuration: level=1
*-cache:1
description: L2 cache
physical id: 9
slot: L2 Cache
size: 2MiB
capacity: 2MiB
clock: 1GHz (1.0ns)
capabilities: pipeline-burst internal write-back unified
configuration: level=2
*-memory
description: System Memory
physical id: d
slot: System board or motherboard
size: 4GiB
*-bank:0
description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 533 MHz (1.9 ns)
product: M471B5673FH0-CF8
vendor: Samsung
physical id: 0
serial:
slot: DIMM 0
size: 2GiB
width: 64 bits
clock: 533MHz (1.9ns)
*-bank:1
description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 800 MHz (1.2 ns)
product: M471B5773CHS-CK0
vendor: Samsung
physical id: 1
serial:
slot: DIMM 1
size: 2GiB
width: 64 bits
clock: 800MHz (1.2ns)
*-pci:0
description: Host bridge
product: Family 16h Processor Root Complex
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 100
bus info: pci@0000:00:00.0
version: 00
width: 32 bits
clock: 33MHz
*-display
description: VGA compatible controller
product: Kabini [Radeon HD 8330]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 1
bus info: pci@0000:00:01.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:35 memory:e0000000-efffffff memory:f2000000-f27fffff ioport:4000(size=256) memory:f2900000-f293ffff memory:c0000-dffff
*-multimedia:0
description: Audio device
product: Kabini HDMI/DP Audio
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 1.1
bus info: pci@0000:00:01.1
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:37 memory:f2940000-f2943fff
*-pci:0
description: PCI bridge
product: Family 16h Processor Functions 5:1
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 2.2
bus info: pci@0000:00:02.2
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:24 ioport:3000(size=4096) memory:f1000000-f1ffffff ioport:f0000000(size=16777216)
*-network
description: Ethernet interface
product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: enp1s0
version: 07
serial:
size: 10Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:32 ioport:3000(size=256) memory:f1000000-f1000fff memory:f0000000-f0003fff
*-pci:1
description: PCI bridge
product: Family 16h Processor Functions 5:1
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 2.3
bus info: pci@0000:00:02.3
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:25 ioport:2000(size=4096) memory:f2800000-f28fffff
*-network
description: Wireless interface
product: RTL8188EE Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlp5s0
version: 01
serial:
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8188ee driverversion=4.15.0-20-generic firmware=N/A ip=192.168.1.95 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:40 ioport:2000(size=256) memory:f2800000-f2803fff
*-usb:0
description: USB controller
product: FCH USB XHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 10
bus info: pci@0000:00:10.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi msix pciexpress xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:18 memory:f2948000-f2949fff
*-storage
description: SATA controller
product: FCH SATA Controller [AHCI mode]
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 11
bus info: pci@0000:00:11.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: storage pm msi ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=64
resources: irq:33 ioport:4118(size=8) ioport:4124(size=4) ioport:4110(size=8) ioport:4120(size=4) ioport:4100(size=16) memory:f294e000-f294e3ff
*-usb:1
description: USB controller
product: FCH USB OHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 12
bus info: pci@0000:00:12.0
version: 39
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci-pci latency=32
resources: irq:18 memory:f294d000-f294dfff
*-usb:2
description: USB controller
product: FCH USB EHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 12.2
bus info: pci@0000:00:12.2
version: 39
width: 32 bits
clock: 66MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=32
resources: irq:17 memory:f294c000-f294c0ff
*-usb:3
description: USB controller
product: FCH USB OHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 13
bus info: pci@0000:00:13.0
version: 39
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci-pci latency=32
resources: irq:18 memory:f294b000-f294bfff
*-usb:4
description: USB controller
product: FCH USB EHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 13.2
bus info: pci@0000:00:13.2
version: 39
width: 32 bits
clock: 66MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=32
resources: irq:17 memory:f294a000-f294a0ff
*-serial UNCLAIMED
description: SMBus
product: FCH SMBus Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 14
bus info: pci@0000:00:14.0
version: 3a
width: 32 bits
clock: 66MHz
configuration: latency=0
*-multimedia:1
description: Audio device
product: FCH Azalia Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 14.2
bus info: pci@0000:00:14.2
version: 02
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:38 memory:f2944000-f2947fff
*-isa
description: ISA bridge
product: FCH LPC Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 14.3
bus info: pci@0000:00:14.3
version: 11
width: 32 bits
clock: 66MHz
capabilities: isa bus_master
configuration: latency=0
*-pci:1
description: Host bridge
product: Family 16h Processor Function 0
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 101
bus info: pci@0000:00:02.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:2
description: Host bridge
product: Family 16h Processor Function 0
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 102
bus info: pci@0000:00:18.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:3
description: Host bridge
product: Family 16h Processor Function 1
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 103
bus info: pci@0000:00:18.1
version: 00
width: 32 bits
clock: 33MHz
*-pci:4
description: Host bridge
product: Family 16h Processor Function 2
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 104
bus info: pci@0000:00:18.2
version: 00
width: 32 bits
clock: 33MHz
*-pci:5
description: Host bridge
product: Family 16h Processor Function 3
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 105
bus info: pci@0000:00:18.3
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=k10temp
resources: irq:0
*-pci:6
description: Host bridge
product: Family 16h Processor Function 4
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 106
bus info: pci@0000:00:18.4
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=fam15h_power
resources: irq:0
*-pci:7
description: Host bridge
product: Family 16h Processor Function 5
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 107
bus info: pci@0000:00:18.5
version: 00
width: 32 bits
clock: 33MHz
*-scsi:0
physical id: 1
logical name: scsi0
capabilities: emulated
*-disk
description: ATA Disk
product: TOSHIBA MQ01ABF0
vendor: Toshiba
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 3M
serial:
size: 465GiB (500GB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=b3b8c372-58cc-4b4f-8586-b1ccd8d87fc4 logicalsectorsize=512 sectorsize=512
*-volume:0
description: Windows NTFS volume
vendor: Windows
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
version: 3.1
serial:
size: 1022MiB
capacity: 1023MiB
capabilities: boot precious readonly hidden nomount ntfs initialized
configuration: clustersize=4096 created=2013-05-02 21:30:19 filesystem=ntfs label=System modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
*-volume:1
description: Windows FAT volume
vendor: MSDOS5.0
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
version: FAT32
serial:
size: 255MiB
capacity: 259MiB
capabilities: boot precious readonly hidden nomount fat initialized
configuration: FATs=2 filesystem=fat name=Basic data partition
*-volume:2
description: Windows NTFS volume
vendor: Windows
physical id: 3
bus info: scsi@0:0.0.0,3
logical name: /dev/sda3
version: 3.1
serial:
size: 122MiB
capacity: 127MiB
capabilities: nofs precious readonly hidden nomount ntfs initialized
configuration: clustersize=4096 created=2013-05-02 21:30:23 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
*-volume:3
description: Windows NTFS volume
vendor: Windows
physical id: 4
bus info: scsi@0:0.0.0,4
logical name: /dev/sda4
logical name: /media/lubuntu/TI10664800G
version: 3.1
serial:
size: 226GiB
capacity: 226GiB
capabilities: ntfs initialized
configuration: clustersize=4096 created=2013-05-02 21:30:26 filesystem=ntfs label=TI10664800G mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 name=Basic data partition state=mounted
*-volume:4
description: Windows NTFS volume
vendor: Windows
physical id: 5
bus info: scsi@0:0.0.0,5
logical name: /dev/sda5
version: 3.1
serial:
size: 325MiB
capacity: 349MiB
capabilities: boot precious readonly hidden nomount ntfs initialized
configuration: clustersize=4096 created=2013-11-05 08:04:12 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
*-volume:5
description: Windows NTFS volume
vendor: Windows
physical id: 6
bus info: scsi@0:0.0.0,6
logical name: /dev/sda6
logical name: /media/lubuntu/New Volume
version: 3.1
serial:
size: 226GiB
capacity: 226GiB
capabilities: ntfs initialized
configuration: clustersize=4096 created=2013-08-25 01:12:31 filesystem=ntfs label=New Volume modified_by_chkdsk=true mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 mounted_on_nt4=true name=Basic data partition resize_log_file=true state=mounted upgrade_on_mount=true
*-volume:6
description: Windows NTFS volume
vendor: Windows
physical id: 7
bus info: scsi@0:0.0.0,7
logical name: /dev/sda7
version: 3.1
serial:
size: 11GiB
capacity: 11GiB
capabilities: boot precious readonly hidden nomount ntfs initialized
configuration: clustersize=4096 created=2013-06-15 07:37:53 filesystem=ntfs label=Recovery name=Basic data partition state=clean
*-scsi:1
physical id: 2
logical name: scsi1
capabilities: emulated
*-cdrom
description: DVD-RAM writer
product: CDDVDW SU-208DB
vendor: TSSTcorp
physical id: 0.0.0
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: TF01
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc
*-scsi:2
physical id: 3
bus info: usb@5:1
logical name: scsi2
capabilities: emulated scsi-host
configuration: driver=usb-storage
*-disk
description: SCSI Disk
product: UDisk
vendor: General
physical id: 0.0.0
bus info: scsi@2:0.0.0
logical name: /dev/sdb
logical name: /cdrom
version: 5.00
size: 3840MiB (4026MB)
capabilities: removable
configuration: ansiversion=2 logicalsectorsize=512 mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 sectorsize=512 state=mounted
*-medium
physical id: 0
logical name: /dev/sdb
logical name: /cdrom
size: 3840MiB (4026MB)
capabilities: partitioned partitioned:dos
configuration: mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 signature=67e97428 state=mounted
*-volume
description: Windows FAT volume
vendor: mkfs.fat
physical id: 2
logical name: /dev/sdb2
version: FAT12
serial:
size: 15EiB
capabilities: primary boot fat initialized
configuration: FATs=2 filesystem=fat









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    0















    I installed Lubuntu 18.04 on the hard drive of a laptop (model: Toshiba Satellite C55Dt-A).



    When I boot into a live Lubuntu via a bootable flash drive (4GB) , sudo parted -l reports /dev/sdb as a 16.1 GB device of "Model: General UDisk (scsi)". I can't identify it, because I only know the laptop has a hard drive and a flash drive (4GB) attached to its USB port. df -h says /dev/sdb is just 1.1 GB. Is the device some virtual one simulated by the live Lubuntu?



    $ sudo parted -l
    Model: ATA TOSHIBA MQ01ABF0 (scsi)
    Disk /dev/sda: 500GB
    Sector size (logical/physical): 512B/512B
    Partition Table: gpt
    Disk Flags:

    Number Start End Size File system Name Flags
    1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
    2 538MB 500GB 500GB lvm


    Warning: The driver descriptor says the physical block size is 2048 bytes, but
    Linux says it is 512 bytes.
    Ignore/Cancel? I
    Model: General UDisk (scsi)
    Disk /dev/sdb: 16.1GB
    Sector size (logical/physical): 2048B/512B
    Partition Table: mac
    Disk Flags:

    Number Start End Size File system Name Flags
    1 2048B 6143B 4096B Apple
    2 6222kB 8614kB 2392kB EFI


    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VG-home: 452GB
    Sector size (logical/physical): 512B/512B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 452GB 452GB ext4


    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VG-root: 42.9GB
    Sector size (logical/physical): 512B/512B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 42.9GB 42.9GB ext4


    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VG-swap: 4295MB
    Sector size (logical/physical): 512B/512B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 4295MB 4295MB linux-swap(v1)


    Model: Unknown (unknown)
    Disk /dev/zram3: 444MB
    Sector size (logical/physical): 4096B/4096B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 444MB 444MB linux-swap(v1)


    Model: Unknown (unknown)
    Disk /dev/zram1: 444MB
    Sector size (logical/physical): 4096B/4096B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 444MB 444MB linux-swap(v1)


    Model: Unknown (unknown)
    Disk /dev/zram2: 444MB
    Sector size (logical/physical): 4096B/4096B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 444MB 444MB linux-swap(v1)


    Model: Unknown (unknown)
    Disk /dev/zram0: 444MB
    Sector size (logical/physical): 4096B/4096B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 444MB 444MB linux-swap(v1)


    and



    $ df -h 
    Filesystem Size Used Avail Use% Mounted on
    udev 1.7G 0 1.7G 0% /dev
    tmpfs 340M 1.4M 338M 1% /run
    /dev/sdb 1.1G 1.1G 0 100% /cdrom
    /dev/loop0 968M 968M 0 100% /rofs
    /cow 1.7G 122M 1.6G 8% /
    tmpfs 1.7G 0 1.7G 0% /dev/shm
    tmpfs 5.0M 4.0K 5.0M 1% /run/lock
    tmpfs 1.7G 0 1.7G 0% /sys/fs/cgroup
    tmpfs 1.7G 4.0K 1.7G 1% /tmp
    tmpfs 340M 12K 340M 1% /run/user/999


    When I boot into the Lubuntu installed on the hard drive, the device "Model: General UDisk (scsi)" doesn't show up in the outputs of sudo parted -l and sudo lshw.
    I was wondering what that device is? Thanks.



    $ sudo parted -l
    [sudo] password for t:
    Model: ATA TOSHIBA MQ01ABF0 (scsi)
    Disk /dev/sda: 500GB
    Sector size (logical/physical): 512B/512B
    Partition Table: gpt
    Disk Flags:

    Number Start End Size File system Name Flags
    1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
    2 538MB 500GB 500GB lvm


    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VG-home: 452GB
    Sector size (logical/physical): 512B/512B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 452GB 452GB ext4


    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VG-swap: 4295MB
    Sector size (logical/physical): 512B/512B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 4295MB 4295MB linux-swap(v1)


    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VG-root: 42.9GB
    Sector size (logical/physical): 512B/512B
    Partition Table: loop
    Disk Flags:

    Number Start End Size File system Flags
    1 0.00B 42.9GB 42.9GB ext4


    and



    $ sudo lshw

    lubuntu
    description: Notebook
    product: Satellite C55Dt-A (PSCFWU)
    vendor: TOSHIBA
    version: PSCFWU-00X005
    serial:
    width: 64 bits
    capabilities: smbios-2.7 dmi-2.7 smp vsyscall32
    configuration: boot=normal chassis=notebook family=Durban Curiosity 10AN sku=PSCFWU uuid=CD932420-D25D-11E2-B47A-008CFA609299
    *-core
    description: Motherboard
    product: Portable PC
    vendor: TOSHIBA
    physical id: 0
    version: MP
    serial: 1
    slot: Base Board Chassis Location
    *-firmware
    description: BIOS
    vendor: Insyde Corp.
    physical id: 0
    version: 1.80
    date: 01/27/2014
    size: 128KiB
    capacity: 4032KiB
    capabilities: pci pnp upgrade shadowing cdboot bootselect edd int9keyboard int10video acpi usb agp smartbattery biosbootspecification netboot uefi
    *-cpu
    description: CPU
    product: AMD A4-5000 APU with Radeon(TM) HD Graphics
    vendor: Advanced Micro Devices [AMD]
    physical id: 4
    bus info: cpu@0
    version: AMD A4-5000 APU with Radeon(TM) HD Graphics
    serial: NotSupport
    slot: Socket FT1
    size: 874MHz
    capacity: 1500MHz
    width: 64 bits
    clock: 100MHz
    capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt topoext perfctr_nb bpext perfctr_llc hw_pstate proc_feedback vmmcall bmi1 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists pausefilter pfthreshold overflow_recov cpufreq
    configuration: cores=4 enabledcores=4 threads=4
    *-cache:0
    description: L1 cache
    physical id: 8
    slot: L1 Cache
    size: 256KiB
    capacity: 256KiB
    clock: 1GHz (1.0ns)
    capabilities: pipeline-burst internal write-back unified
    configuration: level=1
    *-cache:1
    description: L2 cache
    physical id: 9
    slot: L2 Cache
    size: 2MiB
    capacity: 2MiB
    clock: 1GHz (1.0ns)
    capabilities: pipeline-burst internal write-back unified
    configuration: level=2
    *-memory
    description: System Memory
    physical id: d
    slot: System board or motherboard
    size: 4GiB
    *-bank:0
    description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 533 MHz (1.9 ns)
    product: M471B5673FH0-CF8
    vendor: Samsung
    physical id: 0
    serial:
    slot: DIMM 0
    size: 2GiB
    width: 64 bits
    clock: 533MHz (1.9ns)
    *-bank:1
    description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 800 MHz (1.2 ns)
    product: M471B5773CHS-CK0
    vendor: Samsung
    physical id: 1
    serial:
    slot: DIMM 1
    size: 2GiB
    width: 64 bits
    clock: 800MHz (1.2ns)
    *-pci:0
    description: Host bridge
    product: Family 16h Processor Root Complex
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 100
    bus info: pci@0000:00:00.0
    version: 00
    width: 32 bits
    clock: 33MHz
    *-display
    description: VGA compatible controller
    product: Kabini [Radeon HD 8330]
    vendor: Advanced Micro Devices, Inc. [AMD/ATI]
    physical id: 1
    bus info: pci@0000:00:01.0
    version: 00
    width: 64 bits
    clock: 33MHz
    capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
    configuration: driver=radeon latency=0
    resources: irq:35 memory:e0000000-efffffff memory:f2000000-f27fffff ioport:4000(size=256) memory:f2900000-f293ffff memory:c0000-dffff
    *-multimedia:0
    description: Audio device
    product: Kabini HDMI/DP Audio
    vendor: Advanced Micro Devices, Inc. [AMD/ATI]
    physical id: 1.1
    bus info: pci@0000:00:01.1
    version: 00
    width: 64 bits
    clock: 33MHz
    capabilities: pm pciexpress msi bus_master cap_list
    configuration: driver=snd_hda_intel latency=0
    resources: irq:37 memory:f2940000-f2943fff
    *-pci:0
    description: PCI bridge
    product: Family 16h Processor Functions 5:1
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 2.2
    bus info: pci@0000:00:02.2
    version: 00
    width: 32 bits
    clock: 33MHz
    capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
    configuration: driver=pcieport
    resources: irq:24 ioport:3000(size=4096) memory:f1000000-f1ffffff ioport:f0000000(size=16777216)
    *-network
    description: Ethernet interface
    product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
    vendor: Realtek Semiconductor Co., Ltd.
    physical id: 0
    bus info: pci@0000:01:00.0
    logical name: enp1s0
    version: 07
    serial:
    size: 10Mbit/s
    capacity: 100Mbit/s
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
    configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
    resources: irq:32 ioport:3000(size=256) memory:f1000000-f1000fff memory:f0000000-f0003fff
    *-pci:1
    description: PCI bridge
    product: Family 16h Processor Functions 5:1
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 2.3
    bus info: pci@0000:00:02.3
    version: 00
    width: 32 bits
    clock: 33MHz
    capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
    configuration: driver=pcieport
    resources: irq:25 ioport:2000(size=4096) memory:f2800000-f28fffff
    *-network
    description: Wireless interface
    product: RTL8188EE Wireless Network Adapter
    vendor: Realtek Semiconductor Co., Ltd.
    physical id: 0
    bus info: pci@0000:05:00.0
    logical name: wlp5s0
    version: 01
    serial:
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
    configuration: broadcast=yes driver=rtl8188ee driverversion=4.15.0-20-generic firmware=N/A ip=192.168.1.95 latency=0 link=yes multicast=yes wireless=IEEE 802.11
    resources: irq:40 ioport:2000(size=256) memory:f2800000-f2803fff
    *-usb:0
    description: USB controller
    product: FCH USB XHCI Controller
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 10
    bus info: pci@0000:00:10.0
    version: 01
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi msix pciexpress xhci bus_master cap_list
    configuration: driver=xhci_hcd latency=0
    resources: irq:18 memory:f2948000-f2949fff
    *-storage
    description: SATA controller
    product: FCH SATA Controller [AHCI mode]
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 11
    bus info: pci@0000:00:11.0
    version: 00
    width: 32 bits
    clock: 66MHz
    capabilities: storage pm msi ahci_1.0 bus_master cap_list
    configuration: driver=ahci latency=64
    resources: irq:33 ioport:4118(size=8) ioport:4124(size=4) ioport:4110(size=8) ioport:4120(size=4) ioport:4100(size=16) memory:f294e000-f294e3ff
    *-usb:1
    description: USB controller
    product: FCH USB OHCI Controller
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 12
    bus info: pci@0000:00:12.0
    version: 39
    width: 32 bits
    clock: 66MHz
    capabilities: ohci bus_master
    configuration: driver=ohci-pci latency=32
    resources: irq:18 memory:f294d000-f294dfff
    *-usb:2
    description: USB controller
    product: FCH USB EHCI Controller
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 12.2
    bus info: pci@0000:00:12.2
    version: 39
    width: 32 bits
    clock: 66MHz
    capabilities: pm debug ehci bus_master cap_list
    configuration: driver=ehci-pci latency=32
    resources: irq:17 memory:f294c000-f294c0ff
    *-usb:3
    description: USB controller
    product: FCH USB OHCI Controller
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 13
    bus info: pci@0000:00:13.0
    version: 39
    width: 32 bits
    clock: 66MHz
    capabilities: ohci bus_master
    configuration: driver=ohci-pci latency=32
    resources: irq:18 memory:f294b000-f294bfff
    *-usb:4
    description: USB controller
    product: FCH USB EHCI Controller
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 13.2
    bus info: pci@0000:00:13.2
    version: 39
    width: 32 bits
    clock: 66MHz
    capabilities: pm debug ehci bus_master cap_list
    configuration: driver=ehci-pci latency=32
    resources: irq:17 memory:f294a000-f294a0ff
    *-serial UNCLAIMED
    description: SMBus
    product: FCH SMBus Controller
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 14
    bus info: pci@0000:00:14.0
    version: 3a
    width: 32 bits
    clock: 66MHz
    configuration: latency=0
    *-multimedia:1
    description: Audio device
    product: FCH Azalia Controller
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 14.2
    bus info: pci@0000:00:14.2
    version: 02
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi bus_master cap_list
    configuration: driver=snd_hda_intel latency=32
    resources: irq:38 memory:f2944000-f2947fff
    *-isa
    description: ISA bridge
    product: FCH LPC Bridge
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 14.3
    bus info: pci@0000:00:14.3
    version: 11
    width: 32 bits
    clock: 66MHz
    capabilities: isa bus_master
    configuration: latency=0
    *-pci:1
    description: Host bridge
    product: Family 16h Processor Function 0
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 101
    bus info: pci@0000:00:02.0
    version: 00
    width: 32 bits
    clock: 33MHz
    *-pci:2
    description: Host bridge
    product: Family 16h Processor Function 0
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 102
    bus info: pci@0000:00:18.0
    version: 00
    width: 32 bits
    clock: 33MHz
    *-pci:3
    description: Host bridge
    product: Family 16h Processor Function 1
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 103
    bus info: pci@0000:00:18.1
    version: 00
    width: 32 bits
    clock: 33MHz
    *-pci:4
    description: Host bridge
    product: Family 16h Processor Function 2
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 104
    bus info: pci@0000:00:18.2
    version: 00
    width: 32 bits
    clock: 33MHz
    *-pci:5
    description: Host bridge
    product: Family 16h Processor Function 3
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 105
    bus info: pci@0000:00:18.3
    version: 00
    width: 32 bits
    clock: 33MHz
    configuration: driver=k10temp
    resources: irq:0
    *-pci:6
    description: Host bridge
    product: Family 16h Processor Function 4
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 106
    bus info: pci@0000:00:18.4
    version: 00
    width: 32 bits
    clock: 33MHz
    configuration: driver=fam15h_power
    resources: irq:0
    *-pci:7
    description: Host bridge
    product: Family 16h Processor Function 5
    vendor: Advanced Micro Devices, Inc. [AMD]
    physical id: 107
    bus info: pci@0000:00:18.5
    version: 00
    width: 32 bits
    clock: 33MHz
    *-scsi:0
    physical id: 1
    logical name: scsi0
    capabilities: emulated
    *-disk
    description: ATA Disk
    product: TOSHIBA MQ01ABF0
    vendor: Toshiba
    physical id: 0.0.0
    bus info: scsi@0:0.0.0
    logical name: /dev/sda
    version: 3M
    serial:
    size: 465GiB (500GB)
    capabilities: gpt-1.00 partitioned partitioned:gpt
    configuration: ansiversion=5 guid=b3b8c372-58cc-4b4f-8586-b1ccd8d87fc4 logicalsectorsize=512 sectorsize=512
    *-volume:0
    description: Windows NTFS volume
    vendor: Windows
    physical id: 1
    bus info: scsi@0:0.0.0,1
    logical name: /dev/sda1
    version: 3.1
    serial:
    size: 1022MiB
    capacity: 1023MiB
    capabilities: boot precious readonly hidden nomount ntfs initialized
    configuration: clustersize=4096 created=2013-05-02 21:30:19 filesystem=ntfs label=System modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
    *-volume:1
    description: Windows FAT volume
    vendor: MSDOS5.0
    physical id: 2
    bus info: scsi@0:0.0.0,2
    logical name: /dev/sda2
    version: FAT32
    serial:
    size: 255MiB
    capacity: 259MiB
    capabilities: boot precious readonly hidden nomount fat initialized
    configuration: FATs=2 filesystem=fat name=Basic data partition
    *-volume:2
    description: Windows NTFS volume
    vendor: Windows
    physical id: 3
    bus info: scsi@0:0.0.0,3
    logical name: /dev/sda3
    version: 3.1
    serial:
    size: 122MiB
    capacity: 127MiB
    capabilities: nofs precious readonly hidden nomount ntfs initialized
    configuration: clustersize=4096 created=2013-05-02 21:30:23 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
    *-volume:3
    description: Windows NTFS volume
    vendor: Windows
    physical id: 4
    bus info: scsi@0:0.0.0,4
    logical name: /dev/sda4
    logical name: /media/lubuntu/TI10664800G
    version: 3.1
    serial:
    size: 226GiB
    capacity: 226GiB
    capabilities: ntfs initialized
    configuration: clustersize=4096 created=2013-05-02 21:30:26 filesystem=ntfs label=TI10664800G mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 name=Basic data partition state=mounted
    *-volume:4
    description: Windows NTFS volume
    vendor: Windows
    physical id: 5
    bus info: scsi@0:0.0.0,5
    logical name: /dev/sda5
    version: 3.1
    serial:
    size: 325MiB
    capacity: 349MiB
    capabilities: boot precious readonly hidden nomount ntfs initialized
    configuration: clustersize=4096 created=2013-11-05 08:04:12 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
    *-volume:5
    description: Windows NTFS volume
    vendor: Windows
    physical id: 6
    bus info: scsi@0:0.0.0,6
    logical name: /dev/sda6
    logical name: /media/lubuntu/New Volume
    version: 3.1
    serial:
    size: 226GiB
    capacity: 226GiB
    capabilities: ntfs initialized
    configuration: clustersize=4096 created=2013-08-25 01:12:31 filesystem=ntfs label=New Volume modified_by_chkdsk=true mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 mounted_on_nt4=true name=Basic data partition resize_log_file=true state=mounted upgrade_on_mount=true
    *-volume:6
    description: Windows NTFS volume
    vendor: Windows
    physical id: 7
    bus info: scsi@0:0.0.0,7
    logical name: /dev/sda7
    version: 3.1
    serial:
    size: 11GiB
    capacity: 11GiB
    capabilities: boot precious readonly hidden nomount ntfs initialized
    configuration: clustersize=4096 created=2013-06-15 07:37:53 filesystem=ntfs label=Recovery name=Basic data partition state=clean
    *-scsi:1
    physical id: 2
    logical name: scsi1
    capabilities: emulated
    *-cdrom
    description: DVD-RAM writer
    product: CDDVDW SU-208DB
    vendor: TSSTcorp
    physical id: 0.0.0
    bus info: scsi@1:0.0.0
    logical name: /dev/cdrom
    logical name: /dev/cdrw
    logical name: /dev/dvd
    logical name: /dev/dvdrw
    logical name: /dev/sr0
    version: TF01
    capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
    configuration: ansiversion=5 status=nodisc
    *-scsi:2
    physical id: 3
    bus info: usb@5:1
    logical name: scsi2
    capabilities: emulated scsi-host
    configuration: driver=usb-storage
    *-disk
    description: SCSI Disk
    product: UDisk
    vendor: General
    physical id: 0.0.0
    bus info: scsi@2:0.0.0
    logical name: /dev/sdb
    logical name: /cdrom
    version: 5.00
    size: 3840MiB (4026MB)
    capabilities: removable
    configuration: ansiversion=2 logicalsectorsize=512 mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 sectorsize=512 state=mounted
    *-medium
    physical id: 0
    logical name: /dev/sdb
    logical name: /cdrom
    size: 3840MiB (4026MB)
    capabilities: partitioned partitioned:dos
    configuration: mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 signature=67e97428 state=mounted
    *-volume
    description: Windows FAT volume
    vendor: mkfs.fat
    physical id: 2
    logical name: /dev/sdb2
    version: FAT12
    serial:
    size: 15EiB
    capabilities: primary boot fat initialized
    configuration: FATs=2 filesystem=fat









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      I installed Lubuntu 18.04 on the hard drive of a laptop (model: Toshiba Satellite C55Dt-A).



      When I boot into a live Lubuntu via a bootable flash drive (4GB) , sudo parted -l reports /dev/sdb as a 16.1 GB device of "Model: General UDisk (scsi)". I can't identify it, because I only know the laptop has a hard drive and a flash drive (4GB) attached to its USB port. df -h says /dev/sdb is just 1.1 GB. Is the device some virtual one simulated by the live Lubuntu?



      $ sudo parted -l
      Model: ATA TOSHIBA MQ01ABF0 (scsi)
      Disk /dev/sda: 500GB
      Sector size (logical/physical): 512B/512B
      Partition Table: gpt
      Disk Flags:

      Number Start End Size File system Name Flags
      1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
      2 538MB 500GB 500GB lvm


      Warning: The driver descriptor says the physical block size is 2048 bytes, but
      Linux says it is 512 bytes.
      Ignore/Cancel? I
      Model: General UDisk (scsi)
      Disk /dev/sdb: 16.1GB
      Sector size (logical/physical): 2048B/512B
      Partition Table: mac
      Disk Flags:

      Number Start End Size File system Name Flags
      1 2048B 6143B 4096B Apple
      2 6222kB 8614kB 2392kB EFI


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-home: 452GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 452GB 452GB ext4


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-root: 42.9GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 42.9GB 42.9GB ext4


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-swap: 4295MB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 4295MB 4295MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram3: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram1: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram2: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram0: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      and



      $ df -h 
      Filesystem Size Used Avail Use% Mounted on
      udev 1.7G 0 1.7G 0% /dev
      tmpfs 340M 1.4M 338M 1% /run
      /dev/sdb 1.1G 1.1G 0 100% /cdrom
      /dev/loop0 968M 968M 0 100% /rofs
      /cow 1.7G 122M 1.6G 8% /
      tmpfs 1.7G 0 1.7G 0% /dev/shm
      tmpfs 5.0M 4.0K 5.0M 1% /run/lock
      tmpfs 1.7G 0 1.7G 0% /sys/fs/cgroup
      tmpfs 1.7G 4.0K 1.7G 1% /tmp
      tmpfs 340M 12K 340M 1% /run/user/999


      When I boot into the Lubuntu installed on the hard drive, the device "Model: General UDisk (scsi)" doesn't show up in the outputs of sudo parted -l and sudo lshw.
      I was wondering what that device is? Thanks.



      $ sudo parted -l
      [sudo] password for t:
      Model: ATA TOSHIBA MQ01ABF0 (scsi)
      Disk /dev/sda: 500GB
      Sector size (logical/physical): 512B/512B
      Partition Table: gpt
      Disk Flags:

      Number Start End Size File system Name Flags
      1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
      2 538MB 500GB 500GB lvm


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-home: 452GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 452GB 452GB ext4


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-swap: 4295MB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 4295MB 4295MB linux-swap(v1)


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-root: 42.9GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 42.9GB 42.9GB ext4


      and



      $ sudo lshw

      lubuntu
      description: Notebook
      product: Satellite C55Dt-A (PSCFWU)
      vendor: TOSHIBA
      version: PSCFWU-00X005
      serial:
      width: 64 bits
      capabilities: smbios-2.7 dmi-2.7 smp vsyscall32
      configuration: boot=normal chassis=notebook family=Durban Curiosity 10AN sku=PSCFWU uuid=CD932420-D25D-11E2-B47A-008CFA609299
      *-core
      description: Motherboard
      product: Portable PC
      vendor: TOSHIBA
      physical id: 0
      version: MP
      serial: 1
      slot: Base Board Chassis Location
      *-firmware
      description: BIOS
      vendor: Insyde Corp.
      physical id: 0
      version: 1.80
      date: 01/27/2014
      size: 128KiB
      capacity: 4032KiB
      capabilities: pci pnp upgrade shadowing cdboot bootselect edd int9keyboard int10video acpi usb agp smartbattery biosbootspecification netboot uefi
      *-cpu
      description: CPU
      product: AMD A4-5000 APU with Radeon(TM) HD Graphics
      vendor: Advanced Micro Devices [AMD]
      physical id: 4
      bus info: cpu@0
      version: AMD A4-5000 APU with Radeon(TM) HD Graphics
      serial: NotSupport
      slot: Socket FT1
      size: 874MHz
      capacity: 1500MHz
      width: 64 bits
      clock: 100MHz
      capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt topoext perfctr_nb bpext perfctr_llc hw_pstate proc_feedback vmmcall bmi1 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists pausefilter pfthreshold overflow_recov cpufreq
      configuration: cores=4 enabledcores=4 threads=4
      *-cache:0
      description: L1 cache
      physical id: 8
      slot: L1 Cache
      size: 256KiB
      capacity: 256KiB
      clock: 1GHz (1.0ns)
      capabilities: pipeline-burst internal write-back unified
      configuration: level=1
      *-cache:1
      description: L2 cache
      physical id: 9
      slot: L2 Cache
      size: 2MiB
      capacity: 2MiB
      clock: 1GHz (1.0ns)
      capabilities: pipeline-burst internal write-back unified
      configuration: level=2
      *-memory
      description: System Memory
      physical id: d
      slot: System board or motherboard
      size: 4GiB
      *-bank:0
      description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 533 MHz (1.9 ns)
      product: M471B5673FH0-CF8
      vendor: Samsung
      physical id: 0
      serial:
      slot: DIMM 0
      size: 2GiB
      width: 64 bits
      clock: 533MHz (1.9ns)
      *-bank:1
      description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 800 MHz (1.2 ns)
      product: M471B5773CHS-CK0
      vendor: Samsung
      physical id: 1
      serial:
      slot: DIMM 1
      size: 2GiB
      width: 64 bits
      clock: 800MHz (1.2ns)
      *-pci:0
      description: Host bridge
      product: Family 16h Processor Root Complex
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 100
      bus info: pci@0000:00:00.0
      version: 00
      width: 32 bits
      clock: 33MHz
      *-display
      description: VGA compatible controller
      product: Kabini [Radeon HD 8330]
      vendor: Advanced Micro Devices, Inc. [AMD/ATI]
      physical id: 1
      bus info: pci@0000:00:01.0
      version: 00
      width: 64 bits
      clock: 33MHz
      capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
      configuration: driver=radeon latency=0
      resources: irq:35 memory:e0000000-efffffff memory:f2000000-f27fffff ioport:4000(size=256) memory:f2900000-f293ffff memory:c0000-dffff
      *-multimedia:0
      description: Audio device
      product: Kabini HDMI/DP Audio
      vendor: Advanced Micro Devices, Inc. [AMD/ATI]
      physical id: 1.1
      bus info: pci@0000:00:01.1
      version: 00
      width: 64 bits
      clock: 33MHz
      capabilities: pm pciexpress msi bus_master cap_list
      configuration: driver=snd_hda_intel latency=0
      resources: irq:37 memory:f2940000-f2943fff
      *-pci:0
      description: PCI bridge
      product: Family 16h Processor Functions 5:1
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 2.2
      bus info: pci@0000:00:02.2
      version: 00
      width: 32 bits
      clock: 33MHz
      capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
      configuration: driver=pcieport
      resources: irq:24 ioport:3000(size=4096) memory:f1000000-f1ffffff ioport:f0000000(size=16777216)
      *-network
      description: Ethernet interface
      product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
      vendor: Realtek Semiconductor Co., Ltd.
      physical id: 0
      bus info: pci@0000:01:00.0
      logical name: enp1s0
      version: 07
      serial:
      size: 10Mbit/s
      capacity: 100Mbit/s
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
      configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
      resources: irq:32 ioport:3000(size=256) memory:f1000000-f1000fff memory:f0000000-f0003fff
      *-pci:1
      description: PCI bridge
      product: Family 16h Processor Functions 5:1
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 2.3
      bus info: pci@0000:00:02.3
      version: 00
      width: 32 bits
      clock: 33MHz
      capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
      configuration: driver=pcieport
      resources: irq:25 ioport:2000(size=4096) memory:f2800000-f28fffff
      *-network
      description: Wireless interface
      product: RTL8188EE Wireless Network Adapter
      vendor: Realtek Semiconductor Co., Ltd.
      physical id: 0
      bus info: pci@0000:05:00.0
      logical name: wlp5s0
      version: 01
      serial:
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
      configuration: broadcast=yes driver=rtl8188ee driverversion=4.15.0-20-generic firmware=N/A ip=192.168.1.95 latency=0 link=yes multicast=yes wireless=IEEE 802.11
      resources: irq:40 ioport:2000(size=256) memory:f2800000-f2803fff
      *-usb:0
      description: USB controller
      product: FCH USB XHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 10
      bus info: pci@0000:00:10.0
      version: 01
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi msix pciexpress xhci bus_master cap_list
      configuration: driver=xhci_hcd latency=0
      resources: irq:18 memory:f2948000-f2949fff
      *-storage
      description: SATA controller
      product: FCH SATA Controller [AHCI mode]
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 11
      bus info: pci@0000:00:11.0
      version: 00
      width: 32 bits
      clock: 66MHz
      capabilities: storage pm msi ahci_1.0 bus_master cap_list
      configuration: driver=ahci latency=64
      resources: irq:33 ioport:4118(size=8) ioport:4124(size=4) ioport:4110(size=8) ioport:4120(size=4) ioport:4100(size=16) memory:f294e000-f294e3ff
      *-usb:1
      description: USB controller
      product: FCH USB OHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 12
      bus info: pci@0000:00:12.0
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: ohci bus_master
      configuration: driver=ohci-pci latency=32
      resources: irq:18 memory:f294d000-f294dfff
      *-usb:2
      description: USB controller
      product: FCH USB EHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 12.2
      bus info: pci@0000:00:12.2
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: pm debug ehci bus_master cap_list
      configuration: driver=ehci-pci latency=32
      resources: irq:17 memory:f294c000-f294c0ff
      *-usb:3
      description: USB controller
      product: FCH USB OHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 13
      bus info: pci@0000:00:13.0
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: ohci bus_master
      configuration: driver=ohci-pci latency=32
      resources: irq:18 memory:f294b000-f294bfff
      *-usb:4
      description: USB controller
      product: FCH USB EHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 13.2
      bus info: pci@0000:00:13.2
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: pm debug ehci bus_master cap_list
      configuration: driver=ehci-pci latency=32
      resources: irq:17 memory:f294a000-f294a0ff
      *-serial UNCLAIMED
      description: SMBus
      product: FCH SMBus Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 14
      bus info: pci@0000:00:14.0
      version: 3a
      width: 32 bits
      clock: 66MHz
      configuration: latency=0
      *-multimedia:1
      description: Audio device
      product: FCH Azalia Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 14.2
      bus info: pci@0000:00:14.2
      version: 02
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi bus_master cap_list
      configuration: driver=snd_hda_intel latency=32
      resources: irq:38 memory:f2944000-f2947fff
      *-isa
      description: ISA bridge
      product: FCH LPC Bridge
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 14.3
      bus info: pci@0000:00:14.3
      version: 11
      width: 32 bits
      clock: 66MHz
      capabilities: isa bus_master
      configuration: latency=0
      *-pci:1
      description: Host bridge
      product: Family 16h Processor Function 0
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 101
      bus info: pci@0000:00:02.0
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:2
      description: Host bridge
      product: Family 16h Processor Function 0
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 102
      bus info: pci@0000:00:18.0
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:3
      description: Host bridge
      product: Family 16h Processor Function 1
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 103
      bus info: pci@0000:00:18.1
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:4
      description: Host bridge
      product: Family 16h Processor Function 2
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 104
      bus info: pci@0000:00:18.2
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:5
      description: Host bridge
      product: Family 16h Processor Function 3
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 105
      bus info: pci@0000:00:18.3
      version: 00
      width: 32 bits
      clock: 33MHz
      configuration: driver=k10temp
      resources: irq:0
      *-pci:6
      description: Host bridge
      product: Family 16h Processor Function 4
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 106
      bus info: pci@0000:00:18.4
      version: 00
      width: 32 bits
      clock: 33MHz
      configuration: driver=fam15h_power
      resources: irq:0
      *-pci:7
      description: Host bridge
      product: Family 16h Processor Function 5
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 107
      bus info: pci@0000:00:18.5
      version: 00
      width: 32 bits
      clock: 33MHz
      *-scsi:0
      physical id: 1
      logical name: scsi0
      capabilities: emulated
      *-disk
      description: ATA Disk
      product: TOSHIBA MQ01ABF0
      vendor: Toshiba
      physical id: 0.0.0
      bus info: scsi@0:0.0.0
      logical name: /dev/sda
      version: 3M
      serial:
      size: 465GiB (500GB)
      capabilities: gpt-1.00 partitioned partitioned:gpt
      configuration: ansiversion=5 guid=b3b8c372-58cc-4b4f-8586-b1ccd8d87fc4 logicalsectorsize=512 sectorsize=512
      *-volume:0
      description: Windows NTFS volume
      vendor: Windows
      physical id: 1
      bus info: scsi@0:0.0.0,1
      logical name: /dev/sda1
      version: 3.1
      serial:
      size: 1022MiB
      capacity: 1023MiB
      capabilities: boot precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-05-02 21:30:19 filesystem=ntfs label=System modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
      *-volume:1
      description: Windows FAT volume
      vendor: MSDOS5.0
      physical id: 2
      bus info: scsi@0:0.0.0,2
      logical name: /dev/sda2
      version: FAT32
      serial:
      size: 255MiB
      capacity: 259MiB
      capabilities: boot precious readonly hidden nomount fat initialized
      configuration: FATs=2 filesystem=fat name=Basic data partition
      *-volume:2
      description: Windows NTFS volume
      vendor: Windows
      physical id: 3
      bus info: scsi@0:0.0.0,3
      logical name: /dev/sda3
      version: 3.1
      serial:
      size: 122MiB
      capacity: 127MiB
      capabilities: nofs precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-05-02 21:30:23 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
      *-volume:3
      description: Windows NTFS volume
      vendor: Windows
      physical id: 4
      bus info: scsi@0:0.0.0,4
      logical name: /dev/sda4
      logical name: /media/lubuntu/TI10664800G
      version: 3.1
      serial:
      size: 226GiB
      capacity: 226GiB
      capabilities: ntfs initialized
      configuration: clustersize=4096 created=2013-05-02 21:30:26 filesystem=ntfs label=TI10664800G mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 name=Basic data partition state=mounted
      *-volume:4
      description: Windows NTFS volume
      vendor: Windows
      physical id: 5
      bus info: scsi@0:0.0.0,5
      logical name: /dev/sda5
      version: 3.1
      serial:
      size: 325MiB
      capacity: 349MiB
      capabilities: boot precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-11-05 08:04:12 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
      *-volume:5
      description: Windows NTFS volume
      vendor: Windows
      physical id: 6
      bus info: scsi@0:0.0.0,6
      logical name: /dev/sda6
      logical name: /media/lubuntu/New Volume
      version: 3.1
      serial:
      size: 226GiB
      capacity: 226GiB
      capabilities: ntfs initialized
      configuration: clustersize=4096 created=2013-08-25 01:12:31 filesystem=ntfs label=New Volume modified_by_chkdsk=true mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 mounted_on_nt4=true name=Basic data partition resize_log_file=true state=mounted upgrade_on_mount=true
      *-volume:6
      description: Windows NTFS volume
      vendor: Windows
      physical id: 7
      bus info: scsi@0:0.0.0,7
      logical name: /dev/sda7
      version: 3.1
      serial:
      size: 11GiB
      capacity: 11GiB
      capabilities: boot precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-06-15 07:37:53 filesystem=ntfs label=Recovery name=Basic data partition state=clean
      *-scsi:1
      physical id: 2
      logical name: scsi1
      capabilities: emulated
      *-cdrom
      description: DVD-RAM writer
      product: CDDVDW SU-208DB
      vendor: TSSTcorp
      physical id: 0.0.0
      bus info: scsi@1:0.0.0
      logical name: /dev/cdrom
      logical name: /dev/cdrw
      logical name: /dev/dvd
      logical name: /dev/dvdrw
      logical name: /dev/sr0
      version: TF01
      capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
      configuration: ansiversion=5 status=nodisc
      *-scsi:2
      physical id: 3
      bus info: usb@5:1
      logical name: scsi2
      capabilities: emulated scsi-host
      configuration: driver=usb-storage
      *-disk
      description: SCSI Disk
      product: UDisk
      vendor: General
      physical id: 0.0.0
      bus info: scsi@2:0.0.0
      logical name: /dev/sdb
      logical name: /cdrom
      version: 5.00
      size: 3840MiB (4026MB)
      capabilities: removable
      configuration: ansiversion=2 logicalsectorsize=512 mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 sectorsize=512 state=mounted
      *-medium
      physical id: 0
      logical name: /dev/sdb
      logical name: /cdrom
      size: 3840MiB (4026MB)
      capabilities: partitioned partitioned:dos
      configuration: mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 signature=67e97428 state=mounted
      *-volume
      description: Windows FAT volume
      vendor: mkfs.fat
      physical id: 2
      logical name: /dev/sdb2
      version: FAT12
      serial:
      size: 15EiB
      capabilities: primary boot fat initialized
      configuration: FATs=2 filesystem=fat









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      I installed Lubuntu 18.04 on the hard drive of a laptop (model: Toshiba Satellite C55Dt-A).



      When I boot into a live Lubuntu via a bootable flash drive (4GB) , sudo parted -l reports /dev/sdb as a 16.1 GB device of "Model: General UDisk (scsi)". I can't identify it, because I only know the laptop has a hard drive and a flash drive (4GB) attached to its USB port. df -h says /dev/sdb is just 1.1 GB. Is the device some virtual one simulated by the live Lubuntu?



      $ sudo parted -l
      Model: ATA TOSHIBA MQ01ABF0 (scsi)
      Disk /dev/sda: 500GB
      Sector size (logical/physical): 512B/512B
      Partition Table: gpt
      Disk Flags:

      Number Start End Size File system Name Flags
      1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
      2 538MB 500GB 500GB lvm


      Warning: The driver descriptor says the physical block size is 2048 bytes, but
      Linux says it is 512 bytes.
      Ignore/Cancel? I
      Model: General UDisk (scsi)
      Disk /dev/sdb: 16.1GB
      Sector size (logical/physical): 2048B/512B
      Partition Table: mac
      Disk Flags:

      Number Start End Size File system Name Flags
      1 2048B 6143B 4096B Apple
      2 6222kB 8614kB 2392kB EFI


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-home: 452GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 452GB 452GB ext4


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-root: 42.9GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 42.9GB 42.9GB ext4


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-swap: 4295MB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 4295MB 4295MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram3: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram1: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram2: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      Model: Unknown (unknown)
      Disk /dev/zram0: 444MB
      Sector size (logical/physical): 4096B/4096B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 444MB 444MB linux-swap(v1)


      and



      $ df -h 
      Filesystem Size Used Avail Use% Mounted on
      udev 1.7G 0 1.7G 0% /dev
      tmpfs 340M 1.4M 338M 1% /run
      /dev/sdb 1.1G 1.1G 0 100% /cdrom
      /dev/loop0 968M 968M 0 100% /rofs
      /cow 1.7G 122M 1.6G 8% /
      tmpfs 1.7G 0 1.7G 0% /dev/shm
      tmpfs 5.0M 4.0K 5.0M 1% /run/lock
      tmpfs 1.7G 0 1.7G 0% /sys/fs/cgroup
      tmpfs 1.7G 4.0K 1.7G 1% /tmp
      tmpfs 340M 12K 340M 1% /run/user/999


      When I boot into the Lubuntu installed on the hard drive, the device "Model: General UDisk (scsi)" doesn't show up in the outputs of sudo parted -l and sudo lshw.
      I was wondering what that device is? Thanks.



      $ sudo parted -l
      [sudo] password for t:
      Model: ATA TOSHIBA MQ01ABF0 (scsi)
      Disk /dev/sda: 500GB
      Sector size (logical/physical): 512B/512B
      Partition Table: gpt
      Disk Flags:

      Number Start End Size File system Name Flags
      1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp
      2 538MB 500GB 500GB lvm


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-home: 452GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 452GB 452GB ext4


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-swap: 4295MB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 4295MB 4295MB linux-swap(v1)


      Model: Linux device-mapper (linear) (dm)
      Disk /dev/mapper/VG-root: 42.9GB
      Sector size (logical/physical): 512B/512B
      Partition Table: loop
      Disk Flags:

      Number Start End Size File system Flags
      1 0.00B 42.9GB 42.9GB ext4


      and



      $ sudo lshw

      lubuntu
      description: Notebook
      product: Satellite C55Dt-A (PSCFWU)
      vendor: TOSHIBA
      version: PSCFWU-00X005
      serial:
      width: 64 bits
      capabilities: smbios-2.7 dmi-2.7 smp vsyscall32
      configuration: boot=normal chassis=notebook family=Durban Curiosity 10AN sku=PSCFWU uuid=CD932420-D25D-11E2-B47A-008CFA609299
      *-core
      description: Motherboard
      product: Portable PC
      vendor: TOSHIBA
      physical id: 0
      version: MP
      serial: 1
      slot: Base Board Chassis Location
      *-firmware
      description: BIOS
      vendor: Insyde Corp.
      physical id: 0
      version: 1.80
      date: 01/27/2014
      size: 128KiB
      capacity: 4032KiB
      capabilities: pci pnp upgrade shadowing cdboot bootselect edd int9keyboard int10video acpi usb agp smartbattery biosbootspecification netboot uefi
      *-cpu
      description: CPU
      product: AMD A4-5000 APU with Radeon(TM) HD Graphics
      vendor: Advanced Micro Devices [AMD]
      physical id: 4
      bus info: cpu@0
      version: AMD A4-5000 APU with Radeon(TM) HD Graphics
      serial: NotSupport
      slot: Socket FT1
      size: 874MHz
      capacity: 1500MHz
      width: 64 bits
      clock: 100MHz
      capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt topoext perfctr_nb bpext perfctr_llc hw_pstate proc_feedback vmmcall bmi1 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists pausefilter pfthreshold overflow_recov cpufreq
      configuration: cores=4 enabledcores=4 threads=4
      *-cache:0
      description: L1 cache
      physical id: 8
      slot: L1 Cache
      size: 256KiB
      capacity: 256KiB
      clock: 1GHz (1.0ns)
      capabilities: pipeline-burst internal write-back unified
      configuration: level=1
      *-cache:1
      description: L2 cache
      physical id: 9
      slot: L2 Cache
      size: 2MiB
      capacity: 2MiB
      clock: 1GHz (1.0ns)
      capabilities: pipeline-burst internal write-back unified
      configuration: level=2
      *-memory
      description: System Memory
      physical id: d
      slot: System board or motherboard
      size: 4GiB
      *-bank:0
      description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 533 MHz (1.9 ns)
      product: M471B5673FH0-CF8
      vendor: Samsung
      physical id: 0
      serial:
      slot: DIMM 0
      size: 2GiB
      width: 64 bits
      clock: 533MHz (1.9ns)
      *-bank:1
      description: SODIMM DDR3 Synchronous Unbuffered (Unregistered) 800 MHz (1.2 ns)
      product: M471B5773CHS-CK0
      vendor: Samsung
      physical id: 1
      serial:
      slot: DIMM 1
      size: 2GiB
      width: 64 bits
      clock: 800MHz (1.2ns)
      *-pci:0
      description: Host bridge
      product: Family 16h Processor Root Complex
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 100
      bus info: pci@0000:00:00.0
      version: 00
      width: 32 bits
      clock: 33MHz
      *-display
      description: VGA compatible controller
      product: Kabini [Radeon HD 8330]
      vendor: Advanced Micro Devices, Inc. [AMD/ATI]
      physical id: 1
      bus info: pci@0000:00:01.0
      version: 00
      width: 64 bits
      clock: 33MHz
      capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
      configuration: driver=radeon latency=0
      resources: irq:35 memory:e0000000-efffffff memory:f2000000-f27fffff ioport:4000(size=256) memory:f2900000-f293ffff memory:c0000-dffff
      *-multimedia:0
      description: Audio device
      product: Kabini HDMI/DP Audio
      vendor: Advanced Micro Devices, Inc. [AMD/ATI]
      physical id: 1.1
      bus info: pci@0000:00:01.1
      version: 00
      width: 64 bits
      clock: 33MHz
      capabilities: pm pciexpress msi bus_master cap_list
      configuration: driver=snd_hda_intel latency=0
      resources: irq:37 memory:f2940000-f2943fff
      *-pci:0
      description: PCI bridge
      product: Family 16h Processor Functions 5:1
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 2.2
      bus info: pci@0000:00:02.2
      version: 00
      width: 32 bits
      clock: 33MHz
      capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
      configuration: driver=pcieport
      resources: irq:24 ioport:3000(size=4096) memory:f1000000-f1ffffff ioport:f0000000(size=16777216)
      *-network
      description: Ethernet interface
      product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
      vendor: Realtek Semiconductor Co., Ltd.
      physical id: 0
      bus info: pci@0000:01:00.0
      logical name: enp1s0
      version: 07
      serial:
      size: 10Mbit/s
      capacity: 100Mbit/s
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
      configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
      resources: irq:32 ioport:3000(size=256) memory:f1000000-f1000fff memory:f0000000-f0003fff
      *-pci:1
      description: PCI bridge
      product: Family 16h Processor Functions 5:1
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 2.3
      bus info: pci@0000:00:02.3
      version: 00
      width: 32 bits
      clock: 33MHz
      capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
      configuration: driver=pcieport
      resources: irq:25 ioport:2000(size=4096) memory:f2800000-f28fffff
      *-network
      description: Wireless interface
      product: RTL8188EE Wireless Network Adapter
      vendor: Realtek Semiconductor Co., Ltd.
      physical id: 0
      bus info: pci@0000:05:00.0
      logical name: wlp5s0
      version: 01
      serial:
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
      configuration: broadcast=yes driver=rtl8188ee driverversion=4.15.0-20-generic firmware=N/A ip=192.168.1.95 latency=0 link=yes multicast=yes wireless=IEEE 802.11
      resources: irq:40 ioport:2000(size=256) memory:f2800000-f2803fff
      *-usb:0
      description: USB controller
      product: FCH USB XHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 10
      bus info: pci@0000:00:10.0
      version: 01
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi msix pciexpress xhci bus_master cap_list
      configuration: driver=xhci_hcd latency=0
      resources: irq:18 memory:f2948000-f2949fff
      *-storage
      description: SATA controller
      product: FCH SATA Controller [AHCI mode]
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 11
      bus info: pci@0000:00:11.0
      version: 00
      width: 32 bits
      clock: 66MHz
      capabilities: storage pm msi ahci_1.0 bus_master cap_list
      configuration: driver=ahci latency=64
      resources: irq:33 ioport:4118(size=8) ioport:4124(size=4) ioport:4110(size=8) ioport:4120(size=4) ioport:4100(size=16) memory:f294e000-f294e3ff
      *-usb:1
      description: USB controller
      product: FCH USB OHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 12
      bus info: pci@0000:00:12.0
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: ohci bus_master
      configuration: driver=ohci-pci latency=32
      resources: irq:18 memory:f294d000-f294dfff
      *-usb:2
      description: USB controller
      product: FCH USB EHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 12.2
      bus info: pci@0000:00:12.2
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: pm debug ehci bus_master cap_list
      configuration: driver=ehci-pci latency=32
      resources: irq:17 memory:f294c000-f294c0ff
      *-usb:3
      description: USB controller
      product: FCH USB OHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 13
      bus info: pci@0000:00:13.0
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: ohci bus_master
      configuration: driver=ohci-pci latency=32
      resources: irq:18 memory:f294b000-f294bfff
      *-usb:4
      description: USB controller
      product: FCH USB EHCI Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 13.2
      bus info: pci@0000:00:13.2
      version: 39
      width: 32 bits
      clock: 66MHz
      capabilities: pm debug ehci bus_master cap_list
      configuration: driver=ehci-pci latency=32
      resources: irq:17 memory:f294a000-f294a0ff
      *-serial UNCLAIMED
      description: SMBus
      product: FCH SMBus Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 14
      bus info: pci@0000:00:14.0
      version: 3a
      width: 32 bits
      clock: 66MHz
      configuration: latency=0
      *-multimedia:1
      description: Audio device
      product: FCH Azalia Controller
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 14.2
      bus info: pci@0000:00:14.2
      version: 02
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi bus_master cap_list
      configuration: driver=snd_hda_intel latency=32
      resources: irq:38 memory:f2944000-f2947fff
      *-isa
      description: ISA bridge
      product: FCH LPC Bridge
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 14.3
      bus info: pci@0000:00:14.3
      version: 11
      width: 32 bits
      clock: 66MHz
      capabilities: isa bus_master
      configuration: latency=0
      *-pci:1
      description: Host bridge
      product: Family 16h Processor Function 0
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 101
      bus info: pci@0000:00:02.0
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:2
      description: Host bridge
      product: Family 16h Processor Function 0
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 102
      bus info: pci@0000:00:18.0
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:3
      description: Host bridge
      product: Family 16h Processor Function 1
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 103
      bus info: pci@0000:00:18.1
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:4
      description: Host bridge
      product: Family 16h Processor Function 2
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 104
      bus info: pci@0000:00:18.2
      version: 00
      width: 32 bits
      clock: 33MHz
      *-pci:5
      description: Host bridge
      product: Family 16h Processor Function 3
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 105
      bus info: pci@0000:00:18.3
      version: 00
      width: 32 bits
      clock: 33MHz
      configuration: driver=k10temp
      resources: irq:0
      *-pci:6
      description: Host bridge
      product: Family 16h Processor Function 4
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 106
      bus info: pci@0000:00:18.4
      version: 00
      width: 32 bits
      clock: 33MHz
      configuration: driver=fam15h_power
      resources: irq:0
      *-pci:7
      description: Host bridge
      product: Family 16h Processor Function 5
      vendor: Advanced Micro Devices, Inc. [AMD]
      physical id: 107
      bus info: pci@0000:00:18.5
      version: 00
      width: 32 bits
      clock: 33MHz
      *-scsi:0
      physical id: 1
      logical name: scsi0
      capabilities: emulated
      *-disk
      description: ATA Disk
      product: TOSHIBA MQ01ABF0
      vendor: Toshiba
      physical id: 0.0.0
      bus info: scsi@0:0.0.0
      logical name: /dev/sda
      version: 3M
      serial:
      size: 465GiB (500GB)
      capabilities: gpt-1.00 partitioned partitioned:gpt
      configuration: ansiversion=5 guid=b3b8c372-58cc-4b4f-8586-b1ccd8d87fc4 logicalsectorsize=512 sectorsize=512
      *-volume:0
      description: Windows NTFS volume
      vendor: Windows
      physical id: 1
      bus info: scsi@0:0.0.0,1
      logical name: /dev/sda1
      version: 3.1
      serial:
      size: 1022MiB
      capacity: 1023MiB
      capabilities: boot precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-05-02 21:30:19 filesystem=ntfs label=System modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
      *-volume:1
      description: Windows FAT volume
      vendor: MSDOS5.0
      physical id: 2
      bus info: scsi@0:0.0.0,2
      logical name: /dev/sda2
      version: FAT32
      serial:
      size: 255MiB
      capacity: 259MiB
      capabilities: boot precious readonly hidden nomount fat initialized
      configuration: FATs=2 filesystem=fat name=Basic data partition
      *-volume:2
      description: Windows NTFS volume
      vendor: Windows
      physical id: 3
      bus info: scsi@0:0.0.0,3
      logical name: /dev/sda3
      version: 3.1
      serial:
      size: 122MiB
      capacity: 127MiB
      capabilities: nofs precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-05-02 21:30:23 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true name=Basic data partition resize_log_file=true state=dirty upgrade_on_mount=true
      *-volume:3
      description: Windows NTFS volume
      vendor: Windows
      physical id: 4
      bus info: scsi@0:0.0.0,4
      logical name: /dev/sda4
      logical name: /media/lubuntu/TI10664800G
      version: 3.1
      serial:
      size: 226GiB
      capacity: 226GiB
      capabilities: ntfs initialized
      configuration: clustersize=4096 created=2013-05-02 21:30:26 filesystem=ntfs label=TI10664800G mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 name=Basic data partition state=mounted
      *-volume:4
      description: Windows NTFS volume
      vendor: Windows
      physical id: 5
      bus info: scsi@0:0.0.0,5
      logical name: /dev/sda5
      version: 3.1
      serial:
      size: 325MiB
      capacity: 349MiB
      capabilities: boot precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-11-05 08:04:12 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
      *-volume:5
      description: Windows NTFS volume
      vendor: Windows
      physical id: 6
      bus info: scsi@0:0.0.0,6
      logical name: /dev/sda6
      logical name: /media/lubuntu/New Volume
      version: 3.1
      serial:
      size: 226GiB
      capacity: 226GiB
      capabilities: ntfs initialized
      configuration: clustersize=4096 created=2013-08-25 01:12:31 filesystem=ntfs label=New Volume modified_by_chkdsk=true mount.fstype=fuseblk mount.options=rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096 mounted_on_nt4=true name=Basic data partition resize_log_file=true state=mounted upgrade_on_mount=true
      *-volume:6
      description: Windows NTFS volume
      vendor: Windows
      physical id: 7
      bus info: scsi@0:0.0.0,7
      logical name: /dev/sda7
      version: 3.1
      serial:
      size: 11GiB
      capacity: 11GiB
      capabilities: boot precious readonly hidden nomount ntfs initialized
      configuration: clustersize=4096 created=2013-06-15 07:37:53 filesystem=ntfs label=Recovery name=Basic data partition state=clean
      *-scsi:1
      physical id: 2
      logical name: scsi1
      capabilities: emulated
      *-cdrom
      description: DVD-RAM writer
      product: CDDVDW SU-208DB
      vendor: TSSTcorp
      physical id: 0.0.0
      bus info: scsi@1:0.0.0
      logical name: /dev/cdrom
      logical name: /dev/cdrw
      logical name: /dev/dvd
      logical name: /dev/dvdrw
      logical name: /dev/sr0
      version: TF01
      capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
      configuration: ansiversion=5 status=nodisc
      *-scsi:2
      physical id: 3
      bus info: usb@5:1
      logical name: scsi2
      capabilities: emulated scsi-host
      configuration: driver=usb-storage
      *-disk
      description: SCSI Disk
      product: UDisk
      vendor: General
      physical id: 0.0.0
      bus info: scsi@2:0.0.0
      logical name: /dev/sdb
      logical name: /cdrom
      version: 5.00
      size: 3840MiB (4026MB)
      capabilities: removable
      configuration: ansiversion=2 logicalsectorsize=512 mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 sectorsize=512 state=mounted
      *-medium
      physical id: 0
      logical name: /dev/sdb
      logical name: /cdrom
      size: 3840MiB (4026MB)
      capabilities: partitioned partitioned:dos
      configuration: mount.fstype=iso9660 mount.options=ro,noatime,nojoliet,check=s,map=n,blocksize=2048 signature=67e97428 state=mounted
      *-volume
      description: Windows FAT volume
      vendor: mkfs.fat
      physical id: 2
      logical name: /dev/sdb2
      version: FAT12
      serial:
      size: 15EiB
      capabilities: primary boot fat initialized
      configuration: FATs=2 filesystem=fat






      live-usb parted






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